Chapter 29-1- Beyond Our Walls Part 1

[Hellbringer]

I believe (and those better in the know please correct me) sniper checks are when someone does sketching that would normally catch the attention of a sniper.

I'd imagine calling sniper check would make anyone from the military immediately jump to attention

A "sniper check" is when a person salutes another person in a combat zone or any area suspected of having an aggressor looking to take out a high ranking member. Usually it's out of fun, but it goes back to a time when young officers insisted on being saluted, even near the front lines of a war, where the presence of an enemy sniper was high, but that young officer wouldn't think about the dangers of being pointed out as official in a leadership position.

Numerous stories and military urban legends abound on said terminology. (I sound like Perceptor there...)